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is being wired now. The entry wired count is changed to non-zero in advance, before the map lock is dropped. This makes the vm_fault() to perceive the entry as wired, and breaks the fragment which moves the wire count from the shadowed page, to the upper page, making the code unwiring non-wired page. On the other hand, the vm_fault() calls from vm_fault_wire() should be allowed to proceed, so only drain MAP_ENTRY_IN_TRANSITION from vm_fault() when wiring_thread is not current. Reported and tested by: pho Reviewed by: alc Sponsored by: The FreeBSD Foundation MFC after: 2 weeks
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